diff --git a/CHANGELOG.md b/CHANGELOG.md
index a2f487f1..4f3ddfd9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -33,6 +33,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - **Breaking**: Make `VlenV2Codec` private
 - Bump `itertools` to 0.14
 - Indicate that `zfp` / `zfpy` codecs have different metadata in codec table
+- Use `zarr-python` 3.0.0 in compatibility tests
 
 ### Removed
 - Remove support for pcodec `Try{FloatMult,FloatQuant,IntMult}` mode specs
diff --git a/zarrs/src/array.rs b/zarrs/src/array.rs
index b63679d7..69d8040e 100644
--- a/zarrs/src/array.rs
+++ b/zarrs/src/array.rs
@@ -1094,6 +1094,23 @@ mod tests {
         }
     }
 
+    #[test]
+    fn array_v2_none_c() {
+        array_v2_to_v3(
+            "tests/data/v2/array_none_C.zarr",
+            "tests/data/v3/array_none.zarr",
+        )
+    }
+
+    #[ignore] // FIXME: Reported upstream https://github.com/zarr-developers/zarr-python/issues/2675
+    #[test]
+    fn array_v2_none_f() {
+        array_v2_to_v3(
+            "tests/data/v2/array_none_F.zarr",
+            "tests/data/v3/array_none_tranpose.zarr",
+        )
+    }
+
     #[cfg(feature = "blosc")]
     #[test]
     #[cfg_attr(miri, ignore)]
@@ -1105,6 +1122,7 @@ mod tests {
     }
 
     #[cfg(feature = "blosc")]
+    #[ignore] // FIXME: Reported upstream https://github.com/zarr-developers/zarr-python/issues/2675
     #[test]
     #[cfg_attr(miri, ignore)]
     fn array_v2_blosc_f() {
diff --git a/zarrs/tests/data/v2/array_blosc_C.zarr/.zarray b/zarrs/tests/data/v2/array_blosc_C.zarr/.zarray
index 45496252..18342f94 100644
--- a/zarrs/tests/data/v2/array_blosc_C.zarr/.zarray
+++ b/zarrs/tests/data/v2/array_blosc_C.zarr/.zarray
@@ -1,22 +1,23 @@
 {
-    "chunks": [
-        5,
-        5
-    ],
-    "compressor": {
-        "blocksize": 0,
-        "clevel": 1,
-        "cname": "zstd",
-        "id": "blosc",
-        "shuffle": 2
-    },
-    "dtype": "<f4",
-    "fill_value": 0.0,
-    "filters": null,
-    "order": "C",
-    "shape": [
-        10,
-        10
-    ],
-    "zarr_format": 2
+  "shape": [
+    10,
+    10
+  ],
+  "chunks": [
+    5,
+    5
+  ],
+  "fill_value": 0.0,
+  "order": "C",
+  "filters": null,
+  "dimension_separator": ".",
+  "compressor": {
+    "id": "blosc",
+    "cname": "zstd",
+    "clevel": 1,
+    "shuffle": 2,
+    "blocksize": 0
+  },
+  "zarr_format": 2,
+  "dtype": "<f4"
 }
\ No newline at end of file
diff --git a/zarrs/tests/data/v2/array_blosc_C.zarr/.zattrs b/zarrs/tests/data/v2/array_blosc_C.zarr/.zattrs
index a977d991..d5df76e7 100644
--- a/zarrs/tests/data/v2/array_blosc_C.zarr/.zattrs
+++ b/zarrs/tests/data/v2/array_blosc_C.zarr/.zattrs
@@ -1,3 +1,3 @@
 {
-    "key": "value"
+  "key": "value"
 }
\ No newline at end of file
diff --git a/zarrs/tests/data/v2/array_blosc_F.zarr/.zarray b/zarrs/tests/data/v2/array_blosc_F.zarr/.zarray
index ddd975ab..3c527321 100644
--- a/zarrs/tests/data/v2/array_blosc_F.zarr/.zarray
+++ b/zarrs/tests/data/v2/array_blosc_F.zarr/.zarray
@@ -1,22 +1,23 @@
 {
-    "chunks": [
-        5,
-        5
-    ],
-    "compressor": {
-        "blocksize": 0,
-        "clevel": 1,
-        "cname": "zstd",
-        "id": "blosc",
-        "shuffle": 2
-    },
-    "dtype": "<f4",
-    "fill_value": 0.0,
-    "filters": null,
-    "order": "F",
-    "shape": [
-        10,
-        10
-    ],
-    "zarr_format": 2
+  "shape": [
+    10,
+    10
+  ],
+  "chunks": [
+    5,
+    5
+  ],
+  "fill_value": 0.0,
+  "order": "F",
+  "filters": null,
+  "dimension_separator": ".",
+  "compressor": {
+    "id": "blosc",
+    "cname": "zstd",
+    "clevel": 1,
+    "shuffle": 2,
+    "blocksize": 0
+  },
+  "zarr_format": 2,
+  "dtype": "<f4"
 }
\ No newline at end of file
diff --git a/zarrs/tests/data/v2/array_blosc_F.zarr/.zattrs b/zarrs/tests/data/v2/array_blosc_F.zarr/.zattrs
index a977d991..d5df76e7 100644
--- a/zarrs/tests/data/v2/array_blosc_F.zarr/.zattrs
+++ b/zarrs/tests/data/v2/array_blosc_F.zarr/.zattrs
@@ -1,3 +1,3 @@
 {
-    "key": "value"
+  "key": "value"
 }
\ No newline at end of file
diff --git a/zarrs/tests/data/v2/array_blosc_F.zarr/0.0 b/zarrs/tests/data/v2/array_blosc_F.zarr/0.0
index f4101146..404ac43c 100644
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diff --git a/zarrs/tests/data/v2/array_blosc_F.zarr/0.1 b/zarrs/tests/data/v2/array_blosc_F.zarr/0.1
index 4343539f..91cfc088 100644
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diff --git a/zarrs/tests/data/v2/array_blosc_F.zarr/1.0 b/zarrs/tests/data/v2/array_blosc_F.zarr/1.0
index 823b486a..8f42c6fe 100644
Binary files a/zarrs/tests/data/v2/array_blosc_F.zarr/1.0 and b/zarrs/tests/data/v2/array_blosc_F.zarr/1.0 differ
diff --git a/zarrs/tests/data/v2/array_blosc_F.zarr/1.1 b/zarrs/tests/data/v2/array_blosc_F.zarr/1.1
index 26bceb7a..55c1b71f 100644
Binary files a/zarrs/tests/data/v2/array_blosc_F.zarr/1.1 and b/zarrs/tests/data/v2/array_blosc_F.zarr/1.1 differ
diff --git a/zarrs/tests/data/v2/array_bz2_C.zarr/.zarray b/zarrs/tests/data/v2/array_bz2_C.zarr/.zarray
index fef51b96..8e3599ab 100644
--- a/zarrs/tests/data/v2/array_bz2_C.zarr/.zarray
+++ b/zarrs/tests/data/v2/array_bz2_C.zarr/.zarray
@@ -1,19 +1,20 @@
 {
-    "chunks": [
-        5,
-        5
-    ],
-    "compressor": {
-        "id": "bz2",
-        "level": 9
-    },
-    "dtype": "<f4",
-    "fill_value": 0.0,
-    "filters": null,
-    "order": "C",
-    "shape": [
-        10,
-        10
-    ],
-    "zarr_format": 2
+  "shape": [
+    10,
+    10
+  ],
+  "chunks": [
+    5,
+    5
+  ],
+  "fill_value": 0.0,
+  "order": "C",
+  "filters": null,
+  "dimension_separator": ".",
+  "compressor": {
+    "id": "bz2",
+    "level": 9
+  },
+  "zarr_format": 2,
+  "dtype": "<f4"
 }
\ No newline at end of file
diff --git a/zarrs/tests/data/v2/array_bz2_C.zarr/.zattrs b/zarrs/tests/data/v2/array_bz2_C.zarr/.zattrs
index a977d991..d5df76e7 100644
--- a/zarrs/tests/data/v2/array_bz2_C.zarr/.zattrs
+++ b/zarrs/tests/data/v2/array_bz2_C.zarr/.zattrs
@@ -1,3 +1,3 @@
 {
-    "key": "value"
+  "key": "value"
 }
\ No newline at end of file
diff --git a/zarrs/tests/data/v2/array_gzip_C.zarr/.zarray b/zarrs/tests/data/v2/array_gzip_C.zarr/.zarray
index a4eaf036..141b177f 100644
--- a/zarrs/tests/data/v2/array_gzip_C.zarr/.zarray
+++ b/zarrs/tests/data/v2/array_gzip_C.zarr/.zarray
@@ -1,19 +1,20 @@
 {
-    "chunks": [
-        5,
-        5
-    ],
-    "compressor": {
-        "id": "gzip",
-        "level": 9
-    },
-    "dtype": "<f4",
-    "fill_value": 0.0,
-    "filters": null,
-    "order": "C",
-    "shape": [
-        10,
-        10
-    ],
-    "zarr_format": 2
+  "shape": [
+    10,
+    10
+  ],
+  "chunks": [
+    5,
+    5
+  ],
+  "fill_value": 0.0,
+  "order": "C",
+  "filters": null,
+  "dimension_separator": ".",
+  "compressor": {
+    "id": "gzip",
+    "level": 9
+  },
+  "zarr_format": 2,
+  "dtype": "<f4"
 }
\ No newline at end of file
diff --git a/zarrs/tests/data/v2/array_gzip_C.zarr/.zattrs b/zarrs/tests/data/v2/array_gzip_C.zarr/.zattrs
index a977d991..d5df76e7 100644
--- a/zarrs/tests/data/v2/array_gzip_C.zarr/.zattrs
+++ b/zarrs/tests/data/v2/array_gzip_C.zarr/.zattrs
@@ -1,3 +1,3 @@
 {
-    "key": "value"
+  "key": "value"
 }
\ No newline at end of file
diff --git a/zarrs/tests/data/v2/array_gzip_C.zarr/0.0 b/zarrs/tests/data/v2/array_gzip_C.zarr/0.0
index d5bcedf0..f012f727 100644
Binary files a/zarrs/tests/data/v2/array_gzip_C.zarr/0.0 and b/zarrs/tests/data/v2/array_gzip_C.zarr/0.0 differ
diff --git a/zarrs/tests/data/v2/array_gzip_C.zarr/0.1 b/zarrs/tests/data/v2/array_gzip_C.zarr/0.1
index bcdc3152..cf03fcce 100644
Binary files a/zarrs/tests/data/v2/array_gzip_C.zarr/0.1 and b/zarrs/tests/data/v2/array_gzip_C.zarr/0.1 differ
diff --git a/zarrs/tests/data/v2/array_gzip_C.zarr/1.0 b/zarrs/tests/data/v2/array_gzip_C.zarr/1.0
index 981b60d5..67e321df 100644
Binary files a/zarrs/tests/data/v2/array_gzip_C.zarr/1.0 and b/zarrs/tests/data/v2/array_gzip_C.zarr/1.0 differ
diff --git a/zarrs/tests/data/v2/array_gzip_C.zarr/1.1 b/zarrs/tests/data/v2/array_gzip_C.zarr/1.1
index 0cfc1282..b80ca555 100644
Binary files a/zarrs/tests/data/v2/array_gzip_C.zarr/1.1 and b/zarrs/tests/data/v2/array_gzip_C.zarr/1.1 differ
diff --git a/zarrs/tests/data/v2/array_none_C.zarr/.zarray b/zarrs/tests/data/v2/array_none_C.zarr/.zarray
new file mode 100644
index 00000000..5a3a3f7d
--- /dev/null
+++ b/zarrs/tests/data/v2/array_none_C.zarr/.zarray
@@ -0,0 +1,17 @@
+{
+  "shape": [
+    10,
+    10
+  ],
+  "chunks": [
+    5,
+    5
+  ],
+  "fill_value": 0.0,
+  "order": "C",
+  "filters": null,
+  "dimension_separator": ".",
+  "compressor": null,
+  "zarr_format": 2,
+  "dtype": "<f4"
+}
\ No newline at end of file
diff --git a/zarrs/tests/data/v2/array_none_C.zarr/.zattrs b/zarrs/tests/data/v2/array_none_C.zarr/.zattrs
new file mode 100644
index 00000000..d5df76e7
--- /dev/null
+++ b/zarrs/tests/data/v2/array_none_C.zarr/.zattrs
@@ -0,0 +1,3 @@
+{
+  "key": "value"
+}
\ No newline at end of file
diff --git a/zarrs/tests/data/v2/array_none_C.zarr/0.0 b/zarrs/tests/data/v2/array_none_C.zarr/0.0
new file mode 100644
index 00000000..f9dc734c
Binary files /dev/null and b/zarrs/tests/data/v2/array_none_C.zarr/0.0 differ
diff --git a/zarrs/tests/data/v2/array_none_C.zarr/0.1 b/zarrs/tests/data/v2/array_none_C.zarr/0.1
new file mode 100644
index 00000000..2bcffade
Binary files /dev/null and b/zarrs/tests/data/v2/array_none_C.zarr/0.1 differ
diff --git a/zarrs/tests/data/v2/array_none_C.zarr/1.0 b/zarrs/tests/data/v2/array_none_C.zarr/1.0
new file mode 100644
index 00000000..b15fa039
Binary files /dev/null and b/zarrs/tests/data/v2/array_none_C.zarr/1.0 differ
diff --git a/zarrs/tests/data/v2/array_none_C.zarr/1.1 b/zarrs/tests/data/v2/array_none_C.zarr/1.1
new file mode 100644
index 00000000..3bcfed80
Binary files /dev/null and b/zarrs/tests/data/v2/array_none_C.zarr/1.1 differ
diff --git a/zarrs/tests/data/v2/array_none_F.zarr/.zarray b/zarrs/tests/data/v2/array_none_F.zarr/.zarray
new file mode 100644
index 00000000..38db0b4c
--- /dev/null
+++ b/zarrs/tests/data/v2/array_none_F.zarr/.zarray
@@ -0,0 +1,17 @@
+{
+  "shape": [
+    10,
+    10
+  ],
+  "chunks": [
+    5,
+    5
+  ],
+  "fill_value": 0.0,
+  "order": "F",
+  "filters": null,
+  "dimension_separator": ".",
+  "compressor": null,
+  "zarr_format": 2,
+  "dtype": "<f4"
+}
\ No newline at end of file
diff --git a/zarrs/tests/data/v2/array_none_F.zarr/.zattrs b/zarrs/tests/data/v2/array_none_F.zarr/.zattrs
new file mode 100644
index 00000000..d5df76e7
--- /dev/null
+++ b/zarrs/tests/data/v2/array_none_F.zarr/.zattrs
@@ -0,0 +1,3 @@
+{
+  "key": "value"
+}
\ No newline at end of file
diff --git a/zarrs/tests/data/v2/array_none_F.zarr/0.0 b/zarrs/tests/data/v2/array_none_F.zarr/0.0
new file mode 100644
index 00000000..f9dc734c
Binary files /dev/null and b/zarrs/tests/data/v2/array_none_F.zarr/0.0 differ
diff --git a/zarrs/tests/data/v2/array_none_F.zarr/0.1 b/zarrs/tests/data/v2/array_none_F.zarr/0.1
new file mode 100644
index 00000000..2bcffade
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diff --git a/zarrs/tests/data/v2/array_none_F.zarr/1.0 b/zarrs/tests/data/v2/array_none_F.zarr/1.0
new file mode 100644
index 00000000..b15fa039
Binary files /dev/null and b/zarrs/tests/data/v2/array_none_F.zarr/1.0 differ
diff --git a/zarrs/tests/data/v2/array_none_F.zarr/1.1 b/zarrs/tests/data/v2/array_none_F.zarr/1.1
new file mode 100644
index 00000000..3bcfed80
Binary files /dev/null and b/zarrs/tests/data/v2/array_none_F.zarr/1.1 differ
diff --git a/zarrs/tests/data/v2/array_pcodec_C.zarr/.zarray b/zarrs/tests/data/v2/array_pcodec_C.zarr/.zarray
index fbcd53ec..1d30d67d 100644
--- a/zarrs/tests/data/v2/array_pcodec_C.zarr/.zarray
+++ b/zarrs/tests/data/v2/array_pcodec_C.zarr/.zarray
@@ -1,22 +1,25 @@
 {
-    "chunks": [
-        5,
-        5
-    ],
-    "compressor": {
-        "delta_encoding_order": null,
-        "equal_pages_up_to": 262144,
-        "id": "pcodec",
-        "level": 8,
-        "mode_spec": "auto"
-    },
-    "dtype": "<f4",
-    "fill_value": 0.0,
-    "filters": null,
-    "order": "C",
-    "shape": [
-        10,
-        10
-    ],
-    "zarr_format": 2
+  "shape": [
+    10,
+    10
+  ],
+  "chunks": [
+    5,
+    5
+  ],
+  "fill_value": 0.0,
+  "order": "C",
+  "filters": null,
+  "dimension_separator": ".",
+  "compressor": {
+    "id": "pcodec",
+    "level": 8,
+    "mode_spec": "auto",
+    "delta_spec": "auto",
+    "paging_spec": "equal_pages_up_to",
+    "delta_encoding_order": null,
+    "equal_pages_up_to": 262144
+  },
+  "zarr_format": 2,
+  "dtype": "<f4"
 }
\ No newline at end of file
diff --git a/zarrs/tests/data/v2/array_pcodec_C.zarr/.zattrs b/zarrs/tests/data/v2/array_pcodec_C.zarr/.zattrs
index a977d991..d5df76e7 100644
--- a/zarrs/tests/data/v2/array_pcodec_C.zarr/.zattrs
+++ b/zarrs/tests/data/v2/array_pcodec_C.zarr/.zattrs
@@ -1,3 +1,3 @@
 {
-    "key": "value"
+  "key": "value"
 }
\ No newline at end of file
diff --git a/zarrs/tests/data/v2/array_pcodec_C.zarr/0.0 b/zarrs/tests/data/v2/array_pcodec_C.zarr/0.0
index b8f6f6e1..6b67d8b7 100644
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diff --git a/zarrs/tests/data/v2/array_pcodec_C.zarr/0.1 b/zarrs/tests/data/v2/array_pcodec_C.zarr/0.1
index 1d5edb10..8b0dc581 100644
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diff --git a/zarrs/tests/data/v2/array_pcodec_C.zarr/1.0 b/zarrs/tests/data/v2/array_pcodec_C.zarr/1.0
index 1527d815..0930748d 100644
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diff --git a/zarrs/tests/data/v2/array_pcodec_C.zarr/1.1 b/zarrs/tests/data/v2/array_pcodec_C.zarr/1.1
index 0c7bab66..7f5c8161 100644
Binary files a/zarrs/tests/data/v2/array_pcodec_C.zarr/1.1 and b/zarrs/tests/data/v2/array_pcodec_C.zarr/1.1 differ
diff --git a/zarrs/tests/data/v2/array_zfpy_C.zarr/.zarray b/zarrs/tests/data/v2/array_zfpy_C.zarr/.zarray
index a8fd124c..1a6f6e84 100644
--- a/zarrs/tests/data/v2/array_zfpy_C.zarr/.zarray
+++ b/zarrs/tests/data/v2/array_zfpy_C.zarr/.zarray
@@ -1,25 +1,26 @@
 {
-    "chunks": [
-        5,
-        5
-    ],
-    "compressor": {
-        "compression_kwargs": {
-            "tolerance": 0.01
-        },
-        "id": "zfpy",
-        "mode": 4,
-        "precision": -1,
-        "rate": -1,
-        "tolerance": 0.01
+  "shape": [
+    10,
+    10
+  ],
+  "chunks": [
+    5,
+    5
+  ],
+  "fill_value": 0.0,
+  "order": "C",
+  "filters": null,
+  "dimension_separator": ".",
+  "compressor": {
+    "id": "zfpy",
+    "mode": 4,
+    "compression_kwargs": {
+      "tolerance": 0.01
     },
-    "dtype": "<f4",
-    "fill_value": 0.0,
-    "filters": null,
-    "order": "C",
-    "shape": [
-        10,
-        10
-    ],
-    "zarr_format": 2
+    "tolerance": 0.01,
+    "rate": -1,
+    "precision": -1
+  },
+  "zarr_format": 2,
+  "dtype": "<f4"
 }
\ No newline at end of file
diff --git a/zarrs/tests/data/v2/array_zfpy_C.zarr/.zattrs b/zarrs/tests/data/v2/array_zfpy_C.zarr/.zattrs
index a977d991..d5df76e7 100644
--- a/zarrs/tests/data/v2/array_zfpy_C.zarr/.zattrs
+++ b/zarrs/tests/data/v2/array_zfpy_C.zarr/.zattrs
@@ -1,3 +1,3 @@
 {
-    "key": "value"
+  "key": "value"
 }
\ No newline at end of file
diff --git a/zarrs/tests/data/v2/array_zstd_C.zarr/.zarray b/zarrs/tests/data/v2/array_zstd_C.zarr/.zarray
index e5c1d0e3..d705c8ed 100644
--- a/zarrs/tests/data/v2/array_zstd_C.zarr/.zarray
+++ b/zarrs/tests/data/v2/array_zstd_C.zarr/.zarray
@@ -1,20 +1,20 @@
 {
-    "chunks": [
-        5,
-        5
-    ],
-    "compressor": {
-        "checksum": false,
-        "id": "zstd",
-        "level": 5
-    },
-    "dtype": "<f4",
-    "fill_value": 0.0,
-    "filters": null,
-    "order": "C",
-    "shape": [
-        10,
-        10
-    ],
-    "zarr_format": 2
+  "shape": [
+    10,
+    10
+  ],
+  "chunks": [
+    5,
+    5
+  ],
+  "fill_value": 0.0,
+  "order": "C",
+  "filters": null,
+  "dimension_separator": ".",
+  "compressor": {
+    "id": "zstd",
+    "level": 5
+  },
+  "zarr_format": 2,
+  "dtype": "<f4"
 }
\ No newline at end of file
diff --git a/zarrs/tests/data/v2/array_zstd_C.zarr/.zattrs b/zarrs/tests/data/v2/array_zstd_C.zarr/.zattrs
index a977d991..d5df76e7 100644
--- a/zarrs/tests/data/v2/array_zstd_C.zarr/.zattrs
+++ b/zarrs/tests/data/v2/array_zstd_C.zarr/.zattrs
@@ -1,3 +1,3 @@
 {
-    "key": "value"
+  "key": "value"
 }
\ No newline at end of file
diff --git a/zarrs/tests/data/v2_generate.py b/zarrs/tests/data/v2_generate.py
index 0898c466..caad33e6 100644
--- a/zarrs/tests/data/v2_generate.py
+++ b/zarrs/tests/data/v2_generate.py
@@ -5,8 +5,8 @@
 compressor_blosc = Blosc(cname="zstd", clevel=1, shuffle=Blosc.BITSHUFFLE)
 compressor_gzip = GZip(level=9)
 compressor_bz2 = BZ2(level=9)
-compressor_zfpy = ZFPY(mode = 4, tolerance=0.01) # fixed accuracy
-compressor_pcodec = PCodec(level = 8, mode_spec="auto")
+serializer_zfpy = ZFPY(mode = 4, tolerance=0.01) # fixed accuracy
+serializer_pcodec = PCodec(level = 8, mode_spec="auto")
 compressor_zstd = Zstd(level=5, checksum=False)
 
 data = np.array(
@@ -26,28 +26,47 @@
 
 for order in ["C", "F"]:
     for compressor_name, compressor in [
+        ("none", None),
         ("blosc", compressor_blosc),
         ("gzip", compressor_gzip),
         ("bz2", compressor_bz2),
-        ("zfpy", compressor_zfpy),
-        ("pcodec", compressor_pcodec),
         ("zstd", compressor_zstd),
     ]:
-        if order == "F" and compressor_name != "blosc":
+        if order == "F" and compressor is not None and compressor_name != "blosc":
             continue
 
-        store = zarr.DirectoryStore(f"tests/data/v2/array_{compressor_name}_{order}.zarr")
-        try:
-            store.clear()
-        except FileNotFoundError:
-            pass
-        array = zarr.creation.create(
+        array = zarr.create_array(
+            f"tests/data/v2/array_{compressor_name}_{order}.zarr",
+            overwrite=True,
+            zarr_format=2,
             shape=[10, 10],
             chunks=[5, 5],
             dtype=np.float32,
-            compressor=compressor,
+            fill_value=0.0,
+            compressors=[compressor] if compressor else None,
+            order=order,
+        )
+        array[...] = np.array(data)
+        array.attrs["key"] = "value"
+
+
+    for serializer_name, serializer in [
+        ("zfpy", serializer_zfpy),
+        ("pcodec", serializer_pcodec),
+    ]:
+        if order == "F" and serializer is not None and serializer_name != "blosc":
+            continue
+
+        array = zarr.create_array(
+            f"tests/data/v2/array_{serializer_name}_{order}.zarr",
+            overwrite=True,
+            zarr_format=2,
+            shape=[10, 10],
+            chunks=[5, 5],
+            dtype=np.float32,
+            fill_value=0.0,
+            compressors=[serializer] if serializer else None,
             order=order,
-            store=store,
         )
         array[...] = np.array(data)
         array.attrs["key"] = "value"
diff --git a/zarrs/tests/data/v3/array_blosc.zarr/.zarray b/zarrs/tests/data/v3/array_blosc.zarr/.zarray
index 7e8b27fe..cb6e3c26 100644
--- a/zarrs/tests/data/v3/array_blosc.zarr/.zarray
+++ b/zarrs/tests/data/v3/array_blosc.zarr/.zarray
@@ -12,10 +12,10 @@
   "dtype": "<f4",
   "compressor": {
     "id": "blosc",
-    "blocksize": 0,
-    "clevel": 1,
     "cname": "zstd",
-    "shuffle": 2
+    "clevel": 1,
+    "shuffle": 2,
+    "blocksize": 0
   },
   "fill_value": 0.0,
   "order": "C",
diff --git a/zarrs/tests/data/v3/array_none.zarr/.zarray b/zarrs/tests/data/v3/array_none.zarr/.zarray
new file mode 100644
index 00000000..5f4a6649
--- /dev/null
+++ b/zarrs/tests/data/v3/array_none.zarr/.zarray
@@ -0,0 +1,18 @@
+{
+  "node_type": "array",
+  "zarr_format": 2,
+  "shape": [
+    10,
+    10
+  ],
+  "chunks": [
+    5,
+    5
+  ],
+  "dtype": "<f4",
+  "compressor": null,
+  "fill_value": 0.0,
+  "order": "C",
+  "filters": null,
+  "dimension_separator": "."
+}
\ No newline at end of file
diff --git a/zarrs/tests/data/v3/array_none.zarr/.zattrs b/zarrs/tests/data/v3/array_none.zarr/.zattrs
new file mode 100644
index 00000000..d5df76e7
--- /dev/null
+++ b/zarrs/tests/data/v3/array_none.zarr/.zattrs
@@ -0,0 +1,3 @@
+{
+  "key": "value"
+}
\ No newline at end of file
diff --git a/zarrs/tests/data/v3/array_none.zarr/0.0 b/zarrs/tests/data/v3/array_none.zarr/0.0
new file mode 100644
index 00000000..f9dc734c
Binary files /dev/null and b/zarrs/tests/data/v3/array_none.zarr/0.0 differ
diff --git a/zarrs/tests/data/v3/array_none.zarr/0.1 b/zarrs/tests/data/v3/array_none.zarr/0.1
new file mode 100644
index 00000000..2bcffade
Binary files /dev/null and b/zarrs/tests/data/v3/array_none.zarr/0.1 differ
diff --git a/zarrs/tests/data/v3/array_none.zarr/1.0 b/zarrs/tests/data/v3/array_none.zarr/1.0
new file mode 100644
index 00000000..b15fa039
Binary files /dev/null and b/zarrs/tests/data/v3/array_none.zarr/1.0 differ
diff --git a/zarrs/tests/data/v3/array_none.zarr/1.1 b/zarrs/tests/data/v3/array_none.zarr/1.1
new file mode 100644
index 00000000..3bcfed80
Binary files /dev/null and b/zarrs/tests/data/v3/array_none.zarr/1.1 differ
diff --git a/zarrs/tests/data/v3/array_none.zarr/zarr.json b/zarrs/tests/data/v3/array_none.zarr/zarr.json
new file mode 100644
index 00000000..d21827c3
--- /dev/null
+++ b/zarrs/tests/data/v3/array_none.zarr/zarr.json
@@ -0,0 +1,36 @@
+{
+  "zarr_format": 3,
+  "node_type": "array",
+  "shape": [
+    10,
+    10
+  ],
+  "data_type": "float32",
+  "chunk_grid": {
+    "name": "regular",
+    "configuration": {
+      "chunk_shape": [
+        5,
+        5
+      ]
+    }
+  },
+  "chunk_key_encoding": {
+    "name": "v2",
+    "configuration": {
+      "separator": "."
+    }
+  },
+  "fill_value": 0.0,
+  "codecs": [
+    {
+      "name": "bytes",
+      "configuration": {
+        "endian": "little"
+      }
+    }
+  ],
+  "attributes": {
+    "key": "value"
+  }
+}
\ No newline at end of file
diff --git a/zarrs/tests/data/v3/array_pcodec.zarr/.zarray b/zarrs/tests/data/v3/array_pcodec.zarr/.zarray
index a814efda..c78548f8 100644
--- a/zarrs/tests/data/v3/array_pcodec.zarr/.zarray
+++ b/zarrs/tests/data/v3/array_pcodec.zarr/.zarray
@@ -12,10 +12,12 @@
   "dtype": "<f4",
   "compressor": {
     "id": "pcodec",
-    "delta_encoding_order": null,
-    "equal_pages_up_to": 262144,
     "level": 8,
-    "mode_spec": "auto"
+    "mode_spec": "auto",
+    "delta_spec": "auto",
+    "paging_spec": "equal_pages_up_to",
+    "delta_encoding_order": null,
+    "equal_pages_up_to": 262144
   },
   "fill_value": 0.0,
   "order": "C",
diff --git a/zarrs/tests/data/v3/array_pcodec.zarr/zarr.json b/zarrs/tests/data/v3/array_pcodec.zarr/zarr.json
index 23f1b525..f485aff2 100644
--- a/zarrs/tests/data/v3/array_pcodec.zarr/zarr.json
+++ b/zarrs/tests/data/v3/array_pcodec.zarr/zarr.json
@@ -26,10 +26,12 @@
     {
       "name": "pcodec",
       "configuration": {
-        "delta_encoding_order": null,
-        "equal_pages_up_to": 262144,
         "level": 8,
-        "mode_spec": "auto"
+        "mode_spec": "auto",
+        "delta_spec": "auto",
+        "paging_spec": "equal_pages_up_to",
+        "delta_encoding_order": null,
+        "equal_pages_up_to": 262144
       }
     }
   ],
diff --git a/zarrs/tests/data/v3/array_zfp.zarr/.zarray b/zarrs/tests/data/v3/array_zfp.zarr/.zarray
index 5c9a7a07..e7562e89 100644
--- a/zarrs/tests/data/v3/array_zfp.zarr/.zarray
+++ b/zarrs/tests/data/v3/array_zfp.zarr/.zarray
@@ -12,13 +12,13 @@
   "dtype": "<f4",
   "compressor": {
     "id": "zfpy",
+    "mode": 4,
     "compression_kwargs": {
       "tolerance": 0.01
     },
-    "mode": 4,
-    "precision": -1,
+    "tolerance": 0.01,
     "rate": -1,
-    "tolerance": 0.01
+    "precision": -1
   },
   "fill_value": 0.0,
   "order": "C",
diff --git a/zarrs/tests/data/v3/array_zstd.zarr/.zarray b/zarrs/tests/data/v3/array_zstd.zarr/.zarray
index 3564fb0f..b76499c6 100644
--- a/zarrs/tests/data/v3/array_zstd.zarr/.zarray
+++ b/zarrs/tests/data/v3/array_zstd.zarr/.zarray
@@ -12,7 +12,6 @@
   "dtype": "<f4",
   "compressor": {
     "id": "zstd",
-    "checksum": false,
     "level": 5
   },
   "fill_value": 0.0,